Fig. 1From: Cardiac-sparing radiotherapy for locally advanced non-small cell lung cancerPTV contour and LA wall in a patient with a 3.9 cm3 PTV/LA wall overlap. The PTV is shown in red, and the LA wall structure in pink. Isodose lines representing 68.8, 65.2 and 61.9Â Gy (100%, 95% and 90% of the prescribed dose) are plotted a at baseline and b after re-optimization to reduce VLAwall-63-GyBack to article page